linux-kernel - Re: [PATCH] mm: Make {,set}page_address() static inline if WANT_PAGE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <52D66396.5050104@roeck-us.net>
Date:	Wed, 15 Jan 2014 02:31:50 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Michael S. Tsirkin" <mst@...hat.com>
CC:	linux-mm@...ck.org, linux-bcache@...r.kernel.org,
	Vineet Gupta <vgupta@...opsys.com>, sparclinux@...r.kernel.org,
	linux-m68k@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: Make {,set}page_address() static inline if WANT_PAGE_VIRTUAL

On 01/15/2014 01:33 AM, Geert Uytterhoeven wrote:
> {,set}page_address() are macros if WANT_PAGE_VIRTUAL.
> If !WANT_PAGE_VIRTUAL, they're plain C functions.
>
> If someone calls them with a void *, this pointer is auto-converted to
> struct page * if !WANT_PAGE_VIRTUAL, but causes a build failure on
> architectures using WANT_PAGE_VIRTUAL (arc, m68k and sparc):
>
> drivers/md/bcache/bset.c: In function ‘__btree_sort’:
> drivers/md/bcache/bset.c:1190: warning: dereferencing ‘void *’ pointer
> drivers/md/bcache/bset.c:1190: error: request for member ‘virtual’ in something not a structure or union
>
> Convert them to static inline functions to fix this. There are already
> plenty of  users of struct page members inside <linux/mm.h>, so there's no
> reason to keep them as macros.
>
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Tested-by: Guenter Roeck <linux@...ck-us.net>

That also fixes the problem seen in stable-queue for 3.10 and 3.12,
so it may be a better fix for the problem seen there than the patch
provided by Michael.

Guenter

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/